package com.kl.alipay;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.kl.config.AlipayConfig;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("tradeController")
public class TradeController {


    //商户订单号，商户网站订单系统中唯一订单号，必填 WIDout_trade_no
    //付款金额，必填 WIDtotal_amount
    //订单名称，必填 WIDsubject
    //商品描述，可空 WIDbody
    @RequestMapping("alipayTradePagePay")
    @ResponseBody
    public String alipayTradePagePay(String WIDout_trade_no,String WIDtotal_amount,String WIDsubject,String WIDbody) throws AlipayApiException {

        //获得初始化的AlipayClient
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);

        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        //同步回调函数
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        //异步回调函数
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);



        alipayRequest.setBizContent("{\"out_trade_no\":\""+ WIDout_trade_no +"\","
                + "\"total_amount\":\""+ WIDtotal_amount +"\","
                + "\"subject\":\""+ WIDsubject +"\","
                + "\"body\":\""+ WIDbody +"\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
        //alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
        //		+ "\"total_amount\":\""+ total_amount +"\","
        //		+ "\"subject\":\""+ subject +"\","
        //		+ "\"body\":\""+ body +"\","
        //		+ "\"timeout_express\":\"10m\","
        //		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        //请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节

        //请求支付宝,其实就是给我们构建一个form表单,我们拿到这个返回的表单之后直接输出到页面
        //然后就会自动跳转到支付页面
        String result = alipayClient.pageExecute(alipayRequest).getBody();

        //输出
        //out.println(result);  js中out.println 就=于response.getWriter().write(); == ResponseBody
        return result;
    }
}
